Question

How would I check if a variable is one of a few values?

Where IN in Oracle it would read like

where strVar in ('A','H','X','Z')

without having to write

if (strVar == "A" || strVar == "H" || strVar == "X" || strVar =="Z") 

---

editted to change variable name

Answer 1

This should be enough for you:

if(new string[]{"A","B",".."}.Contains(strVar)) {
    .... CONTAINS ...
}

can use also

if(new string[]{"A","B",".."}.Any(strVar)) {
    .... CONTAINS ...
}

but Contains works also on C# 2.0, instead Any no.

EDIT

As correctly pointed out @brendan, get rid of var named variable, that is C# keyword, let’s avoid creating confusion.